ESP32 Pinout Diagram: ESP32 WROOM 32 Pinout

The ESP32 WROOM 32 is a versatile and cost-effective system-on-chip (SoC) module developed by Espressif Systems. Equipped with a dual-core processor, it supports both Wi-Fi and Bluetooth connectivity, making it well-suited for a variety of Internet of Things (IoT) and embedded applications. With ample memory, a range of peripheral interfaces, and low power consumption, the ESP32 WROOM 32 is popular among developers and hobbyists for building wireless-enabled devices. Its open-source development support, compatibility with the Arduino IDE, and integrated security features contribute to its widespread use in the IoT ecosystem.

Here we are showing a highly detailed ESP32 WROOM 32 pinout diagram and lots of general information about the board such as features, uses, advantages and applications.

ESP32 WROOM 32 Pinout


Size 300 KB | JPG Image

Features of ESP32 WROOM 32

Sr. No.FeatureValueInformation
1ProcessorDual-core Tensilica LX6The ESP32 WROOM 32 features a dual-core Tensilica LX6 processor, providing efficient multitasking and performance.
2Wireless ConnectivityWi-Fi (802.11 b/g/n)It supports Wi-Fi connectivity, enabling wireless communication in IoT and embedded applications.
3Bluetooth (Classic & BLE)Additionally, it supports Bluetooth Classic and BLE (Bluetooth Low Energy), expanding its connectivity options for various devices.
4MemoryVaries (Flash & RAM)The module comes with varying amounts of flash memory for program storage and RAM for data storage, offering flexibility in application development.
5Peripheral InterfacesGPIO, SPI, I2C, UART, etc.It provides a variety of peripheral interfaces including GPIO pins, SPI (Serial Peripheral Interface), I2C (Inter-Integrated Circuit), UART (Universal Asynchronous Receiver-Transmitter), etc.
6Power ConsumptionLowDesigned with power efficiency in mind, it is suitable for battery-powered applications, extending battery life in IoT devices.
7Security FeaturesSecure Boot, Flash EncryptionHardware-based security features such as secure boot and flash encryption enhance the overall security of IoT devices using the ESP32 WROOM 32.
8Arduino CompatibilitySupportedIt is supported by the Arduino IDE (Integrated Development Environment), facilitating ease of development for a wide range of developers and hobbyists.
9Open-Source DevelopmentYesEspressif provides an open-source SDK (Software Development Kit) for programming the ESP32, allowing for the creation of custom firmware tailored to specific applications.
10Integrated Wi-Fi/BT AntennaYesThe module includes an integrated Wi-Fi and Bluetooth antenna, simplifying the design and reducing the need for external antennas.
11Operating Voltage3.3VIt operates at a voltage of 3.3V, which is common for many IoT and embedded systems.
12Operating Temperature Range-40°C to 85°CWith an operating temperature range of -40°C to 85°C, it is suitable for deployment in various environmental conditions.
13CertificationFCC, CE, IC, KCC, SRRC, NCC, GOSTThe module is certified by various regulatory bodies including FCC, CE, IC, KCC, SRRC, NCC, and GOST, ensuring compliance with international standards.
14Package TypeQFN (Quad Flat No-Lead)It typically comes in a QFN (Quad Flat No-Lead) package, which is compact and suitable for surface-mount assembly on PCBs.
15Deep Sleep Current< 5 μAIn deep sleep mode, the module consumes less than 5 microamps (μA) of current, conserving power in battery-operated devices during idle periods.
16Real-Time Clock (RTC)YesIt features a real-time clock (RTC), allowing for accurate timekeeping and scheduling of tasks in IoT applications.
17Analog-to-Digital Converter12-bitThe built-in ADC (Analog-to-Digital Converter) has a resolution of 12 bits, enabling precise analog sensor measurements in connected devices.
18PWM Resolution16-bitIt supports PWM (Pulse Width Modulation) with a resolution of 16 bits, enabling fine control over connected devices such as motors and LEDs.
19OTA (Over-the-Air) UpdatesSupportedIt supports OTA (Over-the-Air) updates, allowing for firmware updates to be delivered remotely, enhancing device functionality and security.
20GPIO Output Current40 mAThe GPIO pins can source up to 40 milliamps (mA) of current, providing sufficient drive strength for interfacing with various peripherals.
Features of ESP32 WROOM 32

Physical Characteristics of ESP32 WROOM 32

  1. Dimensions: The ESP32 WROOM 32 module typically has compact dimensions, often around 18mm x 25.5mm, making it suitable for integration into small electronic devices and PCBs.
  2. Package Type: It commonly comes in a QFN (Quad Flat No-Lead) package, which is a surface-mount package with no leads protruding from the sides, facilitating easy soldering onto printed circuit boards (PCBs).
  3. Antenna: The module includes an integrated Wi-Fi and Bluetooth antenna, contributing to its compact design and reducing the need for external antennas in connected devices.
  4. Mounting Holes: Some ESP32 WROOM 32 modules feature mounting holes at the corners, allowing for secure and stable attachment to a PCB or an enclosure.
  5. Connector Interfaces: The module is designed with various connectors and interfaces for GPIO, SPI, I2C, UART, power supply, and other connections, providing flexibility for connecting peripherals and external devices.
  6. Indicator LEDs: Some modules come equipped with indicator LEDs that can be useful for signaling the module’s status or activity, aiding in debugging and troubleshooting.
  7. Printed Circuit Board (PCB) Color: The color of the PCB on the module may vary, but it is commonly green, which is a standard color for PCBs in electronic devices.
  8. Markings and Labels: The module typically features printed markings and labels, including part numbers, regulatory certifications, and other information, aiding in identification and compliance.
  9. Operating Temperature Range: The physical characteristics include its ability to operate within a specified temperature range, often ranging from -40°C to 85°C, ensuring suitability for diverse environmental conditions.
  10. Component Placement: The physical arrangement of components on the module’s PCB is crucial. It includes the placement of the processor, memory, and other components to optimize signal integrity and thermal performance.

Electrical Characteristics of ESP32 WROOM 32

  1. Operating Voltage: The ESP32 WROOM 32 typically operates at a voltage of 3.3V. It is important to ensure that the connected components and peripherals are compatible with this voltage.
  2. Input Voltage Range: The module often supports a range of input voltages, ensuring compatibility with various power supply sources. Commonly, it can operate within a range of 2.2V to 3.6V.
  3. Current Consumption: The module exhibits different current consumption levels based on its operating modes. For example, in deep sleep mode, the current consumption can be less than 5 microamps (μA), contributing to power efficiency in battery-powered applications.
  4. GPIO Output Current: The GPIO (General Purpose Input/Output) pins on the module can typically source up to 40 milliamps (mA) of current. This characteristic is essential for interfacing with and driving external devices.
  5. Flash Memory: The ESP32 WROOM 32 comes with varying amounts of flash memory for program storage. The flash memory size can range from a few megabytes to tens of megabytes, depending on the specific module variant.
  6. RAM (Random Access Memory): In addition to flash memory, the module includes RAM for data storage during program execution. The amount of RAM may vary across different versions of the ESP32 WROOM 32.
  7. Clock Frequency: The module’s processor operates at a specific clock frequency. For the ESP32 WROOM 32, the dual-core Tensilica LX6 processor commonly runs at frequencies ranging from 80 MHz to 240 MHz.
  8. Analog-to-Digital Converter (ADC): The built-in ADC on the module has a certain resolution, often 12 bits. This determines the precision with which the module can convert analog signals into digital values.
  9. PWM (Pulse Width Modulation) Resolution: The module supports PWM with a resolution of 16 bits. This characteristic is crucial for achieving fine control over connected devices, such as motors and LEDs.
  10. Wireless Communication Standards: The ESP32 WROOM 32 supports Wi-Fi (802.11 b/g/n) and Bluetooth (Classic and BLE) communication standards, providing wireless connectivity options for a variety of applications.

Uses of ESP32 WROOM 32

  1. IoT Devices: The ESP32 WROOM 32 is extensively used in the development of Internet of Things (IoT) devices, such as smart home devices, environmental monitoring systems, and connected appliances.
  2. Wireless Sensor Networks: It is employed in wireless sensor networks for collecting data from sensors and transmitting it over Wi-Fi or Bluetooth, enabling remote monitoring and control.
  3. Home Automation: ESP32 WROOM 32 is a popular choice for home automation projects, enabling the creation of smart lighting systems, automated door locks, and temperature control systems.
  4. Robotics: In robotics, the module is used for controlling and communicating with robotic systems. Its dual-core processor and wireless capabilities make it suitable for robotics applications.
  5. Wearable Devices: ESP32 WROOM 32 is utilized in the development of wearable devices such as smartwatches, fitness trackers, and health monitoring devices, leveraging its low power consumption and wireless connectivity.
  6. Industrial Automation: It finds application in industrial automation, facilitating the monitoring and control of machinery, equipment, and processes through wireless communication.
  7. Data Logging Systems: The module is used in data logging applications where it can collect and store data from various sensors, and then transmit or upload the data to a central server or cloud platform.
  8. Smart Agriculture: ESP32 WROOM 32 is employed in smart agriculture solutions, enabling farmers to monitor soil conditions, automate irrigation systems, and gather data for precision farming.
  9. Environmental Monitoring: It is used in environmental monitoring systems to measure and transmit data related to air quality, temperature, humidity, and other environmental parameters.
  10. Educational Projects: ESP32 WROOM 32 is a popular choice for educational projects in electronics and programming. It is used in teaching environments to introduce students to IoT, embedded systems, and wireless communication concepts.

Advantages of ESP32 WROOM 32

  1. Dual-Core Processor: The ESP32 WROOM 32 features a dual-core Tensilica LX6 processor, providing improved multitasking capabilities and overall performance.
  2. Wireless Connectivity: It supports both Wi-Fi (802.11 b/g/n) and Bluetooth (Classic and BLE), enabling seamless wireless communication and connectivity in IoT and embedded projects.
  3. Cost-Effective: The ESP32 WROOM 32 is a cost-effective solution, offering a balance between performance and affordability, making it accessible for hobbyists, students, and commercial projects.
  4. Versatility: With a variety of GPIO pins and support for multiple communication interfaces (SPI, I2C, UART), it is versatile and can be easily interfaced with a wide range of sensors, actuators, and other peripherals.
  5. Memory Options: The module comes with varying amounts of flash memory and RAM, providing flexibility to accommodate different program sizes and data storage requirements.
  6. Low Power Consumption: Designed for power efficiency, the ESP32 WROOM 32 can operate in low-power modes, making it suitable for battery-powered applications and energy-conscious projects.
  7. Security Features: It incorporates hardware-based security features such as secure boot and flash encryption, enhancing the overall security of connected devices and IoT applications.
  8. Arduino Compatibility: The ESP32 WROOM 32 is supported by the Arduino IDE, simplifying the development process and allowing a broad community of developers to leverage their existing knowledge and skills.
  9. OTA (Over-the-Air) Updates: The module supports Over-the-Air updates, enabling remote firmware updates without the need for physical access to the device, enhancing flexibility and scalability in IoT deployments.
  10. Community Support: Being a product of Espressif Systems, the ESP32 WROOM 32 benefits from a large and active community of developers. This community support contributes to continuous improvement, troubleshooting, and the availability of a wealth of resources and libraries.
  11. Integration with Cloud Services: The ESP32 WROOM 32 can easily integrate with various cloud platforms, allowing developers to store and retrieve data, implement remote monitoring, and leverage cloud services in their projects.
  12. Real-Time Clock (RTC): The inclusion of a real-time clock in the module facilitates accurate timekeeping, crucial for applications requiring precise timing and scheduling.

Applications of ESP32 WROOM 32

  1. Smart Home Devices: ESP32 WROOM 32 is commonly used in the development of smart home devices, including smart lights, thermostats, door locks, and security cameras, enabling users to control and monitor their homes remotely.
  2. IoT Weather Stations: It is employed in the creation of IoT-based weather stations that collect environmental data such as temperature, humidity, and atmospheric pressure, and transmit this information to a central server or cloud platform.
  3. Industrial Automation: ESP32 WROOM 32 is utilized in industrial automation for monitoring and controlling machinery, processes, and equipment wirelessly. It enables the implementation of smart factories and Industry 4.0 solutions.
  4. Health Monitoring Devices: In wearable health devices and remote patient monitoring systems, the ESP32 WROOM 32 is used to collect and transmit health-related data such as heart rate, temperature, and activity levels.
  5. Smart Agriculture: It is applied in agriculture for creating smart farming solutions, including soil moisture monitoring, automated irrigation systems, and crop health monitoring, enhancing precision agriculture practices.
  6. Asset Tracking: ESP32 WROOM 32 is used in asset tracking systems, allowing real-time tracking and monitoring of assets such as vehicles, containers, or equipment using GPS and other sensors.
  7. Smart Lighting Systems: It finds application in smart lighting systems, enabling users to control and automate lighting conditions in homes, offices, or outdoor environments through wireless connectivity.
  8. Educational Projects: ESP32 WROOM 32 is widely used in educational settings for teaching electronics, programming, and IoT concepts. Students often use it in projects to gain hands-on experience in building connected systems.
  9. Robotics: In robotics projects, the ESP32 WROOM 32 is employed for controlling and communicating with robotic devices. Its dual-core processor and wireless capabilities make it suitable for a variety of robotic applications.
  10. Remote Control Systems: The module is used in creating remote control systems for various applications, such as remote-controlled cars, drones, and home automation, allowing users to control devices from a distance.
  11. Data Logging Systems: ESP32 WROOM 32 is utilized in data logging applications where it collects, stores, and transmits data from sensors. This is commonly applied in environmental monitoring, research projects, and scientific experiments.
  12. Access Control Systems: It is used in access control systems for secure entry to buildings or facilities. The ESP32 WROOM 32 can be integrated into electronic door locks and access control panels for wireless authentication.